Some people like splayed-out springs, so that not all the springs are under the same tension and so have the same resonant frequency. They'll even adjust the spring claw so that one end is nearer the edge of the cavity than the other to change the spring tensions. Eric Johnson used 3 springs on the bass side, then a gap, then one spring on the treble side. But then he didn't have the trem floating, so no upward bends were possible.